\\[-1.8ex] Soil Heterogeneity & $-$0.891$^{***}$ & $-$0.857$^{***}$ & $-$0.737$^{***}$ & $-$0.771$^{***}$ & $-$0.773$^{***}$ & $-$0.713$^{***}$ & $-$0.289$^{*}$ \\ 
  & (0.304) & (0.224) & (0.220) & (0.223) & (0.213) & (0.208) & (0.162) \\ 
  & & & & & & & \\ 
 Share Using Fertilizer$_{t-1}$ &  &  &  &  &  &  & $-$2.615$^{***}$ \\ 
  &  &  &  &  &  &  & (0.133) \\ 
  & & & & & & & \\ 
\\[-1.8ex] 
Oster $\delta$ for $\beta=0$ &  & 7.32 & 3.62 & 4.06 & 3.88 & 3.06 & 1.00 \\ 
Observations & 8,983 & 8,983 & 8,983 & 8,983 & 8,983 & 8,971 & 8,971 \\ 
R$^{2}$ & 0.002 & 0.278 & 0.292 & 0.294 & 0.295 & 0.300 & 0.333 \\ 
